太阳早晨从（）方地平线升起，傍晚往（）方落入地平线下。
A、北南
B、东西
参考答案：B
16. Nothing taught by others can have the same effect on you as _____ learned by yourself.
A．that
B．what
C．which
D．It
高炉对烧结矿质量的要求有哪些？
